I see this as almost finished. I'm not sure on the title and I think the interview may need more work; I'm stumped in regards to both. I'd appreciate any input on them or anything else that could improve the piece.

SCP-XXXX is housed underground at Site-16 in a containment cell for sapient humanoids which includes a bed, table, two chairs, and a bathroom.
Listing exactly what's in the room seems unnecessary.

In the event SCP-XXXX becomes chronically uncooperative and on the approval of at least two members of O5 rank, SCP-XXXX may be dismembered and left in a deceased state permanently. SCP-XXXX is to be informed of this contingency.
Seems a little extreme. And by a little, I mean WAY too extreme. Also, you mention that he can, in effect, keep coming back from the dead without limit. Not only is that too OP, but you address the whole thing in a really blase way.

SCP-XXXX has the appearance and genetic makeup of a Caucasian human male
Does that mean he is a Caucasian male? If he is, then he doesn't 'appear' to be.

It does have control over the specific location the anomaly affects on the victim, so long as SCP-XXXX is conscious.
What's the point of this? Why is it important that he has this ability? It doesn't really help anything.

SCP-XXXX after its death [REDACTED] resulting in full regeneration.
Pointless redaction is pointless.

The interview log has some tonal problems for me. The agent being interviewed is really unprofessional and amateurish sounding, not at all in vein with SCP standards. If you wanted to explain how the skip was captured, maybe just throw a line at the end of the description saying how he was taken into custody.

If this is your first attempt, maybe don't do a humanoid? One of the most commonly repeated pieces of advices is 'Don't do a humanoid, J or anything attached to a group like AWCY for your first SCP.'

SCP-XXXX is housed underground at Site-16 in a containment cell for sapient humanoids which includes a bed, table, two chairs, and a bathroom.

"SCP-XXXX is to be housed in a standard humanoid containment cell at Site 40".

The containment cell is connected to the Site via a 40 meter long access corridor.

"Site" should not be capitalized here.

All security personnel assigned to SCP-XXXX are to carry tranquilizer guns for use against SCP-XXXX in addition to their standard armament. In the event of containment breach, security personnel are to maintain a minimum distance of 20 meters and subdue SCP-XXXX using tranquilizers

"Tranquilizer guns" don't work as well as you might think from Hollywood. They're not magic weapons that KO the target instantly and harmlessly. With an intramuscular injection, which is the best you're going to get firing darts at a fully clothed moving target unless you're a Marvel Comics superhero, your target will start to feel sleepy maybe a half hour after injection - and that's assuming you don't shoot him with too many darts and kill him instead.

In the event SCP-XXXX becomes chronically uncooperative and on the approval of at least two members of O5 rank, SCP-XXXX may be dismembered and left in a deceased state permanently. SCP-XXXX is to be informed of this contingency.

1) There's no reason to bother the directors of the entire Foundation over a matter this trivial.
2) Why would we tell the dangerous phenomenon we're trying to keep contained what our plans are?

SCP-XXXX has the appearance and genetic makeup of a Caucasian human male

"Has the appearance and genetic makeup of" is clumsy and could simply be replaced with "is".

with height 170cm, weight 72kg, and approximately age 34.

Excessive and not particularly relevant details, and potentially obsolete if the individual has a heavy workout session one day and drops a few pounds (or, you know, ages.)

SCP-XXXX’s anomalous properties manifest if it sustains an injury involving the separation of body tissues or blood from its body.

Agent Salis: We left our station in [REDACTED] as soon as we got the call about some guy losing the flesh on his fingers in ████████.

"This man has suffered a minor flesh injury! Get the top secret shadow government on the horn RIGHT THIS INSTANT!"

It was only a █ hour drive, but it was ████ hours when we left so it was pretty damn late when we got there. Agent Gerra saw this P.O.S. motel as we rolled into town and suggested it as a good place to set up base camp.

"Alright, men, we've got a dangerous entity running loose and we're the only people around who can stop it. Let's all take a nap. Shit, I left the company credit card in my other pants. Who has money? Private, I hope you don't mind sleeping in the bathtub."

Agent Quaren was just about to take us out of there when the receptionist must have said something one of the guys didn’t like, because he pulled out a handgun and put a round into the receptionist’s face.

So this is a world where people just randomly shoot hotel receptionists in the face over minor disputes, in front of multiple witnesses who just happen to be an elite paramilitary response unit?

The guy who shot the receptionist was just turning to take us on when his head just kinda exploded. Then the receptionist stood back up. Still had blood running down his face, but the gunshot wound was gone.

And the victim just happens to be the paranormal entity the soldiers were looking for, but they weren't looking for it when they stepped into that motel lobby?

That's a hell of a series of coincidences.

We were all pretty terrified.

I can guarantee you anyone assigned to MTF duty has seen more terrifying things than that.

It was Gerra’s first time seeing a skip in the field, so he pretty much freaked out and emptied his sidearm into him.

MTF personnel are elite soldiers with years of combat experience who have gone through intense psychological screening and training to prepare them for exactly this sort of thing. They are not fragile green recruits who go off half-cocked Full Metal Jacket style at the first site of the specific entity they were briefed that they were supposed to be looking for.

Quaren ordered me to grab the tranquilizer gun from the truck while he bought us some time. He pulled out the grenade he always carried, pulled the pin, and lobbed it through the door while I ran for the truck.

"Kill the subject with a hand grenade" seems to be a bit overkill when the goal is "keep it distracted".

Dr. ████████: Why was Agent Quaren carrying a hand grenade?

Agent Salis: He use to be retrieval. Liked being “prepared”.

I'm fairly sure soldiers going into a combat scenario do not get to pick their own equipment load as if this were X-Com and they were weighing whether they need the stun rod or the auto-cannon for this mission.

I wasn't really aiming, but the dart managed to hit him in the abdomen. He was on the ground about two seconds latter.

As noted above, either the receptionist is now dead from a sedative overdose, or the "tranquilizers" are made of solid lead slugs.

It is the opinion of the Ethics Committee that tests involving the death or severe dismemberment of SCP-XXXX be discontinued, as they contribute to its increasing uncooperativeness and a decrease in effectiveness of our disobedience deterrent.

"Don't make it angry. We won't like it when it's angry."

This is a cliche X-Man article that crosses the Able Line, takes no prisoners, and makes the Foundation look less competent than Torchwood.